Solvent for acetyl cellulose.



vmrnsmrm H PATENT: oFrioE.

, ASSIGNOR TO THE c'ELLULoIn WILLIAM c: LINDSAY, OF NEW YORK, N. Y. compan a. or NEW' Yo K, 1\T.'Y., A oonronnrron or NEW JERSEY.

' soLvENrroRncETYL cELLuLosE.

1,027,615, Specification of Letters Patent. Patented May 28,1912, no Drawing. Application filedjAugust 10, 1911. Serial No. 643,373.

To all whom it may concern 7 Be it known that I, WILLIAM G. LINDSAY, a citizen. of the United States, residing'in the city of New York, county of New York, State of New York, have invented. certain, new and useful Improvements in Solvents for Ac-etyl Cellulose, of which the following is a specification.-

The various compositions to which the 10 present invention relates are employed in the arts, sometimes as imitations of natural substances and sometimes as films which are used for photographic purposes, whether as the base for the sensitized film which is superimposed, or as a component part of the film with which the sensitized substance has been tion.

partially incorporated in'the Sensitiza Although the final or useful form of the different compounds of acetyl cellulose is.

" that of a solid or dried material, the different processes of conversion into this final-solid form involve, as is well understood, the emiployment of solutions or mixturesof vvarymg consistencies as to plact-icity, stiffness or fluidity, dependent generally upon thc'proportion and'kind' of solvent used-Etc the amount of the original jbase-acetylcellulose;

- In thetreatment of acetyl' cellulose for the production of solutions for the manufac; ture of lacquers, varnishes, photographic films and flexible or plastic compounds,'I have discovered that et-hyleneacetochlorhy drin, CILCICH OOCCI-I is avaluable solvent for the acetone-soluble variety of acetyl cellulose. It has a boiling point of about 145 0.; is substantiallyinsoluble in water; is stable, andthe resulting products, such as films, varnishes, coatings, sheets, solid ob- 40 jects, e'tc., are substantially free from odor. It willbe understood'by those skilled in the 'a'rt'that acetpne, for; instance, is-a-solvent by itself of some varieties of -acetyT .cellulose, andit willlikewise-be understood that alcohol andether are non-solvents, while again, epichlorhydrin is a solvent. This will instruct the operator that my new solvent may be used in conjunction with substances such as I have indicated which, either as solvents in themselves for acetylcellulose or as non-solvents 1n themselves, are used -to re v strain the volatility or modify thev solvent action of the other ingredients to adapt the the compound for the individual purposes for which it is to be used, andwhat varying degrees of temperature, pressure and atmospheric exposure should be used to accom-.

plish the object.

As 'oneexaniple of a methodof carrying out my invention practically I proceed as follows .I take one part of acetyl cellulose, which is soluble inacetone, and introduce.'

it into ten parts (by weight) of ethyleneacetochlorhydrin. The acetyl cellulose dissolves L slowly andthe solution is-formed by stirring and suitable mixing. The solution, thus prepared may be used alone or in conjunction with other solvents or non-solvent liquids" or solids, such as methyl or ethyl a1- cohol, acetone, ethylacetate, camphor and its substitutes, etc.

, What I claim and desire to secure by Letters Patent is:

1. A new composition of matter consisting v of a solution of acetyl cellulose in ethyl acetochlorhydrin. I

2. A new composition of matter consisting.-

of a solution of acetyl cellulose in ethyleneacetochlorhydrin in admixture with other substances either in liquid orsolid' form.

3.v A new composition of matter consisting-of a solution of acetyl cellulose in ethyleneacetochlorhydrin in admixture with other solvents and with the accompaniment of 1nert matters to form pounds.-

, Witnesses:

- J. HINDON HYDE,

MABEL DENTON.

solid or liquid com-- WILLIAM'G. LIN1) SAY.- 

